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Other Operating Expenses (Details)
$ in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2017
USD ($)
Dec. 31, 2017
CLP ($)
Dec. 31, 2016
CLP ($)
Dec. 31, 2015
CLP ($)
Other Operating Expenses        
Write-offs for operating risks   $ 6,360 $ 5,475 $ 6,981
Operations expenses leasing   10,152 1,893 1,096
Card administration   2,890 3,921 3,373
Provisions for contingencies     6,880 6,360
Other   6,466 8,767 5,021
Total $ 42,032 $ 25,868 $ 26,936 $ 22,831